java追加文件内容
package com.file;import java.io.BufferedWriter;import java.io.File;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.RandomAccessFile;/** * * @author tsingheng * @version 2012-11-13 下午15:43:41 */public class Test {public static void method1(String file, String conent) { BufferedWriter out = null; try { out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true))); out.write(conent + "\r\n"); } catch (Exception e) { e.printStackTrace(); } finally { try { if(out != null){ out.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 追加文件：使用FileWriter * * @param fileName * @param content */ public static void method2(String fileName, String content) { FileWriter writer = null; try { // 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件 writer = new FileWriter(fileName, true); writer.write(content + "\r\n"); } catch (IOException e) { e.printStackTrace(); } finally { try { if(writer != null){ writer.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 追加文件：使用RandomAccessFile * * @param fileName 文件名 * @param content 追加的内容 */ public static void method3(String fileName, String content) { RandomAccessFile randomFile = null; try { // 打开一个随机访问文件流，按读写方式 randomFile = new RandomAccessFile(fileName, "rw"); // 文件长度，字节数 long fileLength = randomFile.length(); // 将写文件指针移到文件尾。 randomFile.seek(fileLength); randomFile.writeBytes(content + "\r\n"); } catch (IOException e) { e.printStackTrace(); } finally{ if(randomFile != null){ try {randomFile.close();} catch (IOException e) {e.printStackTrace();} } } } public static void main(String[] args) {try{File file = new File("h:/log.txt");if(file.createNewFile()){System.out.println("Create file");}method1("h:/log.txt", "method1");method2("h:/log.txt", "method2");method3("h:/log.txt", "method3");System.out.println("Append success");}catch(Exception e){System.out.println(e);}}}